We accept the default
It’s human nature. We normally accept whatever is in front of us. Our brains can’t do the math, we work with too many stimuli per second to figure out every single decision. Our brains take the path of least resistance because we are on the lookout for things that could harm us.
This isn’t a bad thing, nor should you think of it as such. If we considered every option we would be paralyzed by choice. If you thought going through your closet in the morning on a stressful day is bad, considering every decision that presents itself to us is that feeling times 1000x.
So, we take the default, and we should, for most things. The hard part of life is determining of what defaults you don’t want to take and doing the hard work up from in changing them.
Don't accept the defaults you don't want